This is a list of state leaders in the 20th century (1951–2000) AD, such as the heads of state, heads of government, and the general secretaries of single-party states.
These polities are generally sovereign states, including states with limited recognition (when recognised by at least one UN member state), but excludes minor dependent territories, whose leaders can be found listed under territorial governors in the 20th century. For completeness, these lists can include colonies, protectorates, or other dependent territories that have since gained sovereignty.
Angola
Cameroon
Central African Republic
Chad
Congo, Democratic Republic of the
Congo: Republic of the
Guinea
Gabon
São Tomé and Príncipe
Burundi
Comoros
Djibouti
Eritrea
Ethiopia
Kenya
Madagascar
Mauritius
Rwanda
Seychelles
Somalia
Tanzania
Uganda
Libya
Tunisia
Egypt
Sudan
Algeria
Morocco
Botswana
Eswatini/ Swaziland
Lesotho
Malawi
Mozambique
Namibia
South Africa
Zambia
Zimbabwe
Benin
Burkina Faso
Cape Verde
Gambia
Ghana
Guinea-Bissau
Ivory Coast
Liberia
Mali
Mauritania
Niger
Nigeria
Senegal
Sierra Leone
Togo
Anguilla
Antigua and Barbuda
The Bahamas
Barbados
Cuba
Dominica
Dominican Republic
Grenada
Haiti
Jamaica
Saint Kitts and Nevis
Saint Lucia
Saint Vincent and the Grenadines
Trinidad and Tobago
Belize
Costa Rica
El Salvador
Guatemala
Honduras
Nicaragua
Panama
Canada
Mexico
United States
Argentina
Bolivia
Brazil
Chile
Colombia
Ecuador
Guyana
Netherlands
Paraguay
Peru
Suriname
Uruguay
Venezuela
Brunei
Cambodia
East Timor
Indonesia
Laos
Malaysia
Myanmar / Burma
Philippines
Singapore
Thailand
Vietnam
Afghanistan
Bangladesh
Bhutan
India
Maldives
Nepal
Pakistan
Sri Lanka
Bahrain
Cyprus
Iran
Iraq
Israel
Jordan
Kuwait
Lebanon
Oman
Palestine
Qatar
Saudi Arabia
Syria
Turkey
United Arab Emirates
Yemen: North
Yemen: South
Yemen: United
Albania
Bulgaria
Greece
Kosovo
Yugoslavia: Serbia & Yugoslavia
Yugoslavia: Bosnia and Herzegovina
Yugoslavia: Croatia
Yugoslavia: Macedonia
Yugoslavia: Slovenia
Estonia
Latvia
Lithuania
Ireland
United Kingdom
Austria
Czechoslovakia
Germany
Hungary
Liechtenstein
Poland
Switzerland
Belarus
Moldova
Romania
Russia
Ukraine
Denmark
Finland
Iceland
Norway
Sweden
Italy
Malta
San Marino
Vatican
Andorra
Portugal
Spain
Belgium
France
Luxembourg
Monaco
Armenia
Azerbaijan
Georgia
Australia
Papua New Guinea
Fiji
French Polynesia
Kiribati
Marshall Islands
Micronesia
Nauru
New Zealand
Palau
Samoa and American Samoa
Solomon Islands
Tonga
Tuvalu
Vanuatu
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